I am putting a 220 repeater together using an ICOM IC-RPP2210. The repeater is working except the PTT LED remains illuminated all the time. It goes ever so slightly brighter when the repeater is keyed up. I measure 1.56 volts dc at the PTT line between the controller and repeater un-keyed. I measure .67 volts dc when the repeater is keyed up. I have tried applying 12 volts to a 10k ohm resistor with the other end connected to the PTT line with no change. The PTT LED remains on. I even tried a 1K resistor in the same configuration. The PTT LED remains on. The repeater is transmitting and receiving just fine with the RC210 controller.
Any suggestions? Thanks, Glenn
